Feature/memory config

.gitignore

@@ -1 +1,3 @@
-node_modules
+node_modules
+examples/*/*
+!examples/*/install.js

README.md

@@ -15,7 +15,12 @@ You must make 3 changes to your project to get started:
 2. Export the server instance in `src/server.js`
 3. Ignore the local build folder `__sapper__`
 
-Check out this [demo project](https://github.com/beyonk-adventures/now-sapper-demo) that uses this builder. It can be used as a template, or a way to verify correct usage of the following instructions.
+To install a working example of a vercel-sapper template ready for deployment or development, see the `examples` directory.
+
+```
+cd examples/sapper-template
+node install.js
+```
 
 ##### 1. Configure `vercel-sapper` as builder in `vercel.json`
 
@@ -66,6 +71,27 @@ Example `package.json`
 }
 ```
 
+##### Memory Configuration
+
+You can change the amount of memory your lambda runs with. This is useful to optimise costs.
+
+Note that reducing memory also reduces the amount of CPU available to the lambda, so try some values before you optimise too much.
+
+```json
+{
+  "version": 2,
+  "builds": [
+    {
+      "src": "package.json",
+      "use": "vercel-sapper",
+      "config": {
+        "memory": 3008 // default, in megabytes
+      }
+    }
+  ]
+}
+```
+
 ##### No-build usage
 
 Useful if you are building the project on CI, and then want to just push the compiled source.

examples/README.MD

@@ -0,0 +1,5 @@
+## Installing Examples
+
+Go into the directory for the example you want to see, and run:
+
+`js ./install.js`

examples/sapper-template/install.js

@@ -0,0 +1,56 @@
+'use strict'
+
+const replace = require('replace')
+const degit = require('degit')
+const { writeFileSync, writeFile } = require('fs')
+const { join } = require('path')
+
+async function clone () {
+  const emitter = degit('sveltejs/sapper-template', {
+    force: true
+  })
+
+  emitter.on('info', info => {
+    console.log(info.message)
+  })
+
+  return emitter.clone('.')
+}
+
+async function patch () {
+  replace({
+    regex: /polka\(\)/,
+    replacement: 'export default polka()',
+    paths: [
+      join(__dirname, 'src', 'server.js')
+    ]
+  })
+
+  writeFileSync(
+    join(__dirname, 'vercel.json'),
+    `{
+  "version": 2,
+  "builds": [
+    {
+      "src": "package.json",
+      "use": "vercel-sapper"
+    }
+  ]
+}` 
+  )
+
+  writeFileSync(
+    join(__dirname, '.vercelignore'),
+    `__sapper__
+cypress
+node_modules` 
+  )
+}
+
+function info () {
+  console.log('Example installed. Deploy with `vercel`')
+}
+
+clone()
+  .then(patch)
+  .then(info)

index.js

@@ -47,6 +47,7 @@ exports.build = async ({
 
   // Use the system-installed version of `node` when running via `vercel dev`
   const runtime = meta.isDev ? 'nodejs' : nodeVersion.runtime
+  const memory = config.memory || undefined
 
   const lambda = await createLambda({
     files: {
@@ -56,7 +57,8 @@ exports.build = async ({
       ...applicationFiles
     },
     handler: 'launcher.launcher',
-    runtime: runtime
+    runtime,
+    ...memory ? { memory } : {}
   }).catch(e => {
     console.error('createLambda.error', e)
     console.error('createLambda.config', config)